Car-check



G. M. JOHNSON.

CAR CHECK.

APPLICATION FILED SEP T 6,1917.

Patented Apr. 27, 1920.

2 SHEETS-SHEE1 I.

WITNESS mvzm'bn.

G. M JOHNSON.

CAR CHECK.

APPLICATION FILED SEPT.6, 1917.

Patented Apr. 27, 1920.

2 SHEETS-SHEET 2x i a, trackrail and comparativelyinexpensive struction, combination and arrangement of *IUNHED TAT PATENT OFFICE I anon-en M. JOHNSON, or McnoN'ALD, IENNSYLVANIA.

CAR-CHECK.

Specification'of Letters Patent.

Patented Apr. 27, 1920.

Application filed September 6. 1917. Serial No. 189.987.

To 0. 1 whom. it may concern "en oi the United States of America. 1; at l dcDonald, county of, lVashnrg ton, and State of Pennsylvanla, have in- Yented certain new and useful Improve anism automatically operated 'by the wheels of a car for the purpose or retarding the speed of the car under such conditions reducing possibility damage to a minimum' due to collision.

is is weltknown in connection with mine vars, when traveling toward the cage, that when the speed of thecar is'not arrested it will coast upon the cage and not only damage 1t, butany car or cars mounted thereon and to overcome these serious objections is one or theadvantagesot the invention, and to this end the invention aims toprovide, in a manner as hereinafter set forth, a regulatable fluid controlled and automatically operable car check, operating against the webs of the Wheels otthe car,-wher eby;t-he

flanges or". the wheel willbe forced against the head of the trackrail, and the speed of the car retarded. v A further ob ect of the. invention is to provide a our check, in amanner as hereinafter set forth, including a .fluid controlled! retarding mechanism provided with regulat- 1 ing means wherebythe speed, atwhich the car travels over the. check rail can'be regulated. I

Further objects of the invention areto provide a car check for the purpose set forth which is comparatively simple in its construction and arrangement, strong, gauto matic in its action, having conveniently op-' erative means for regulation, etlicient and convenient in its use, readily set up: ad acent to manufacture. 1

With the foregoing and-other objects in v ewthe invention-consists of anojve'l conit known that I. (inonon M. JOHNSON,.

Fig. 2.

' 1 arts .as:hereinafter more specifically described and illust 'ated in the accompanying drawing wherein.- is. shown an embodiment of the invention, but it is to be understood that changes,'variations and modifications can he resorted to which come within the scope of the claims-hereunto appended.

In the drawings wherein like. reference characters denote corresponding parts throughout. the several views Figure 1 is a. top'plan view, broken away,

of a tear check in accordance with this in vention showing the adaptation thereof in (JOIIDBLtlOIl with a trackra l.-

Fig: 2 is a longitudinal sectional view on line II I1, Fig. .1. 7

Fi g. 3 is asectional plan on line I IL-II'I I Fig. 4: is a-cro'ss sectional view on line IV1IV Fig; 2.1 5 isa detail of the link forshiftingthe checkrail. i

Fig. (Sis a detailshowing a'car wheel engaging the checkrail'.

mechanism When using the'de'vice, two checks are em-.

ployed, each fastened to the track adjacent one ottwo'parallel trackrails, and the check can be arranged interiorly or exteriorly with respect tothe trackrail; preferably the gle- 'ice is arrangedinteriorly ot the rail.

The check consists of a resistancecylinder. 1-, provided at one end with a flange 2, and

at its potherend with a conical extension 3, having ts free terminus flanged as at; 4, and to wh ch 1ssecured a head -plate 5, hav-- ing its inner face provided with an inwardly extending lug 16, formed with an openin" 7; The lug 6 projects into the extension 3. he head 5, h'as interposed therebetween and the flange 4 a gasket '8. The hea'd 5 is connected to the-flanged by securing devices 9'.

The cylinder l and extension 3 are off-set as at 10, to provide chamber 11 fora pur-:

pose to be presently referred to.

f The top of the'chamberll is indicated as 12, and which is provided with an opening for the passage of a shaft 13,having its lower end mounted in the bottom 14, of the chamber 11 (see Fig. 4 Connected to the upper end of the shaft 13 is the collar 15, of

a. crank arm 16; the latter has its free'end provided with a stud 17. The collar 15 rests npon the top'12 of the chamber 11, and said top is cutaway to; provide a; seat 18 for a I packing ring 19 which extends into the collar 15 and around-shaft 13.

Securedto the lower end of'the shaft 13 is the collar 18 of a crank arm 19 having a bifurcated inner end 20, which is pivotally connected as at 21 to a connecting link 22.

The collar 18 is keyed to the shaft 13 as at 23. The crank arm 19 projects into the which is as shown in Fig. 3. The function of the crank arms 16 and 19 and the con necting link22, is to shift the piston rearwardly to control the movement of the checkrail, to be hereinafter referred to, when the device is employed to retard the speed of the car. v V

The piston 25, is provided'witha chamber 25, the latter, whenzthepiston is shifted 'rearwardly, closed by pivoted flap-valve 28 arranged within the rear end of the piston 25. The flap-valve 28, is opened when the piston 25,, is shiftedforwardly. The forward portion ofthe piston 25, as indicated at 25", is formed with a bore 29*, which opens into the chamber or pocket The forward portion 25 of thepiston 25, has a transverse opening 30, which intersects the bore 29.

The connecting link 22, which also may be termed a piston rod, extends through the v bore 29, and. into the chamber or pocket 4O 25, and the saidlink 22, is pivotally connected to the piston 25, by a'couphng pin 31, which is mounted in the transverse open- The resistance cylinder 1,35 adapted to contain a body of fluid, preferably oil, and

- the rearward movement of the piston 25,

iscontrolled by. the discharge of the fluid from the chamber 26. 7 During the rearward movement of the piston, the fluid,

such as oil, will leak past the piston 25, 'but on the return movement ofthe piston,

the valve 28, will be swung open and the fluid w1ll be drawn through the bore 29, into the pocket 25*, and discharged from said chamber, as thevalve .28, will auto .matically open as the p1stonmoves for- The piston 25, has an annularwardly. flange 32, wh1ch surrounds the valve 28 and. said piston is furthermore, provided with a packing ring which engages the wall of the chamber 26, duringthe travel.

of the piston 25.

The car-check further inclu des; an oil reservoir or container. 34, which is formed by, a. receptacle 35, the latter has a rounded bot one directionof the piston 25.

45 ispivotally. connected, as. at 47, to the tom 36, provided with an outlet nipple 37,

normally closed by a cut-off 38. One side of the receptacle 35, is formed wlth a'port 39,

which constitutes an inlet or a discharge opening for the oil in the container 34, that is to say, when the oil or fluid is forced from the chamber 26, by the piston 25, the port 39, then constitutes an inlet forthe container 34, and when the oil or fiuidjis drawn into the chamber 26,by the movement of the piston, when traveling forwardly, due

tothe action of the spring 28, the oil or fluid in' the container 34, is drawn through the port 39, into the chamber 26, and the port then constitutes an outlet. One side of the receptacle 35, has formed integral with the periphery, a boss or collar 40, to which a flange 41, of the resistance cylinderl, is connected by securing devices 42. Interposed between the collar 40, and the flange 41, is a gasket 43. That point of the periphery of the receptacle 35, which is surrounded by the collar 40, as indicated at 44 provides a seat for a controlling valve 45, the function of the latter is to regulate the discharge of oiljor fluid from the chamber 26, so as to control the movement in body of the receptacle 35.

The receptacle 35, has formed integral with the interior thereof, a partitioned web. 48, provided with openings 49, for the pas-- sage of an adjusting stem 50, for the valve Mounted in the web 48, is a nut '51,

with which engages the threaded inner portion 52, of the stem 50. The web 48, is

so'set up, that the nut 51, will beheld fastv therein, whereby, when the stem 50, is adjusted, nut 51, will not turn and will hold the stem 50, in adjusted position.

The stem 50, projects outwardly from the receptacle 35, andsuit-able packing elements '53,. are provi c'ledfo'r vthe stem'50, tO PfQ- vent leakage.

The receptacle 35,

has the inner face of its body, near its top, formed withan inwardly extending annular flange 54, pro VlCllhg a seat for a strainer-element, consisting of a strip or sheet of canvas, or'other suitable fabric 55, and a. foraminous strip 56, the latter former.

The valve being superposed on the."

The receptacle; 35, is closed by a flanged cover 5'7, theilange ofthe. latter being i'n-I (heated at 58, andwhich bears 'onthe strip 56. Securing devices 59, areprovided for securing thecover57, in'position. A gasket;

60, is interposed between thefcover 5Tan'd1 the top of the .'body of the receptacle '35,

The foraminous strip 56-is employed for strainer element formed by the strips 55,56,

used -t'o prevent discharge of oil from the container 34, but notto prevent the dis reinforcing the strip of; fabric 55, and the charge of air, or in other words the strainer element is employed to prevent the air forced from the container 34,. from carrying off particles of oil. The air forced from the container 34, is discharged through aliningports 61, 62, formed respectively in the flange 5S and the body portion of the receptacle The resistance cylinder 1, and extension 3, have an entrance opening 62 which is normally closed by a removable cover plate 63, the latter being detachably connected in position by securing devices 64:.

The receptacle 35, resistance cylinder 1 and extension 3, have lateral webs 65, through which extend securing devices 66, for fixedly maintaining said extension, cylinder and receptacle, in position relativeto the trackrail 67.

The receptacle 35 and cylinder 1, have lateral supports 68, for a checkrail 69, the latter shifting on the supports 68, when occasion so requires.

The checkrail 69, is in the form of an angle-shaped bar, having the ends 70, 71,

extended at an angle with respect to the intermediate portion of said checkrail and toward the other elements of the device. The checkrail has its end 71 pivotally mounted, asat 72, upon-a supporting plate 73; the latter is fixedly secured in position. The intermediate portion of the checkrail, that is that part which extends from the end 71, to the end 70, is disposed at an inclination with respect to the trackrail 67. The checkrail 69, when mounted in position is arranged above the tread of the trackrail 67, and the forward part of the intermediate portion of said checkrail'69, slightly extends over the tread of the trackrail 67. The intermediate part of the checkrail 69, in proximity to the inclined end 70, is formed with an elongated longitudinal slot 7 4*, through which the stud 17 extends. A head indicated at 75, is employed for connecting the stud 17, to the checkrail 69. The slot 7 4, in connection with the stud 17, and head 7 5, provides a slidable connection between the checkrail 69, and the crank arm 16. The crank arm 19 is of greater length than the crank arm 16. The key 23 not only couples the collar. 18* of the crank arm 19, with the shaft 13, but also couples the collar 15, of the crank arm 16.

It will be assumed that the elements of the device are in position, as shown in dotted lines in Fig. 1, which is that the piston 25, has been shifted rearwardly, due to the action of the checkrail 69, upon the operative connection therebetween and the piston 25. hen pressure is relieved on the checkrail 69. the spring 28, moves the piston 25, for-v wardly and shifts the crank-arm 16 and the checkrail'69, the latter will be shifted to the position shown in Fig. 1. The spring 28, when pressure is relieved from off the checkrail 69, moves the piston 25, forwardly to the position shown in full lines in Fig. 3.

The position of the checkrail 29, is such that the vertical. leg 76, thereof, will be engaged by the flange of the car-wheel as the car travels along the track, thereby shifting-the checkrail, against the pressure of the spring 28, and the oil or fluid drawn into the chamber 26, on the forward movement of the piston. The fluid or oil within the chamber 26, sets up an abutment to retard the rearward movement of the piston and owing to such abutment the checkrail 69, cannot be moved quickly by the car-wheels to provide clearance, due to the retardation of the rearward stroke of the piston. The rearward movement of the piston is con trolled by the discharge of oil or fluid from the chamber 26, and such movement fast or slow is governed by the size of the discharge opening of the chamber 26, which is formed by the bore 39, the latter being controlled by the valve 45. If the oil is discharged slowly from the chamber 26, the rearward movement of the piston 25, is slow but if the oil is discharged rapidly from the chamv ber 26, the rearward stroke of the piston 25,

is fast. If the stroke of the piston is slow,

' the checkrail moves correspondingly; under such oond1t1ons the travel of the car n contact with the checkrail will be slow. If the stroke of the piston is fast the checkrail moves correspondingly, and the travel of the car will be rapid. It is obvious, in view of the control of the discharge from the.

chamber 26, that by properly adjusting stem 50 the speed of the car can be. regulated to the oint desired.

Vi hat I claim is:

1. A car check comprising a pivoted checkrail capable of being shifted by the wheels of a car, and a regulatable fluid cushioned retarding mechanism for said rail, said rail being disposed at an inclination with respect to a trackrail and said rail further having angle-shaped end portions,

one of said angle-shaped end portions being pivoted, and means normally holding the checkrail in the path of travel of the car wheel slidably connecting said retarding mechanism to said rail in proximity to the other angle-shaped end portion.

for regulating the discharge of fluid to control the movement of the checkrail.

3. A car check comprising a pivoted checkrail, a" resistance cylinder having a piston operating therein, means for slidably connecting the piston to the checkrail, a fluid container capable of communicating with said cylinder, a resilient element connected with the piston, and means for controlling discharge of fluid from the cylinder to the container to regulate the movement of the piston in one direction.

4. A car check comprising a pivoted checkrail, a resistance cylinder having a piston operating therein, means for slidably connecting the piston to the checkrail, a fluid container capable of communicating 'With said cylinder, a resilient element connected with the piston, and means for controlling discharge of fluid from the cylinder to the container toregulate the movement of the piston in one direction, said container provided with air outlets, and further hav ing a strainer element below said'outlets.

In testimony whereof I afiix my signature in the presence of two Witnesses.

GEORGE M. JOHNSON. \Vitnesses 7' MAX H. SRoLovrrz, LUELLA H. SIMON. 

